What is Meridian AGENTS.md?

A repository guide for the Meridian project. It explains how to connect to Meridian, work from the target repository, and limit activity to the specified project.

Use it when operating Meridian from its repository root or when the usual network download command is unavailable.

It gives coding agents the project scope and connection instructions needed to work safely within Meridian.

How meridianmcp/Meridian configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to meridianmcp/Meridian. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/meridianmcp/Meridian/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/meridianmcp/Meridian

Made for: Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/meridianmcp/meridian/agents-md/github.svg)](https://agentmods.dev/instructions/meridianmcp/meridian/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/meridianmcp/meridian/agents-md"><img src="https://agentmods.dev/badge/instructions/meridianmcp/meridian/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/meridianmcp/meridian/agents-md"><img src="https://agentmods.dev/badge/instructions/meridianmcp/meridian/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 9,218 This file is loaded in full into every session.

When invoked 9,218 The same file — it is already loaded in full.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.09218	$0.09218
Opus 5.5	$0.03687	$0.03687
Sonnet 5.5	$0.01844	$0.01844
Haiku 4.5	$0.00922	$0.00922

Measured 15d ago against content hash d90c5b268617, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Meridian AGENTS.md scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 15d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL https://raw.githubusercontent.com/meridianmcp/Meridian/main/.claude/skills/goal/SKILL.md \

AGENTS.md · 692 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

15d ago Changed · +13 tokens per session d90c5b268617
20d ago Changed · +4 lines · +120 tokens per session b19d940fbc86
1mo ago Changed · +9 lines · +156 tokens per session 9a0f6d554653
1mo ago Changed · +73 lines · +1,249 tokens per session 5bdf7a47d20d
2mo ago Changed · +108 lines · +1,553 tokens per session 8e1c1ede577b
2mo ago First seen · 498 lines · 6,127 tokens per session scan A 9957283a5cec

Subscribe to this mod's changes

Meridian AGENTS.md is an instructions file published in the GitHub repository meridianmcp/Meridian (0 stars, last pushed yesterday), with no licence file. It adds 9,218 tokens to every session, about $0.0369 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Meridian AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Meridian AGENTS.mdmeridianmcp/Meridian	Instructions file	0	yesterday	none	A	9,218	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

Meridian: Instructions file for Codex